Page 19 of your manual indicates if you want to use the bi-amp feature then you give up the use of the rear surrounds....which makes sense since it's only got 7 channels of processing and after all the amp assign mode to biamp is called "5ch biamp". If you did hook up an amp to the rear surrounds you'd just get a full range L\/R signal like the designated bi-amp channels get.\n\nAh ok. Finally. Answer.\n\nNow I can sleep tonight.\n\nExcept with this being the case, how do the presence speakers work? And how does dialogue-lift work then? It has 9 speaker outputs on it. Does zone-2 only work when zone 1 is not being run in a 7.1 configuration?